Trap.



S, RICHARDSON.

TRAP.

APPLICATION FILED JUNE 9. 19m.

1,167,?17. Patenfed Ja11.11,1916.

WITNESSES X Z INVENTOR COLUMBIA PLANOGRAPH C0 WASHINGTON. D

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sAIuUEL RICHARDSON, or CHICAGO, ILLINOIS, AssIcNOR TO CRANE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

TRAP.

errie.

Specification of Letters Patent.

Patented Jan. 11,1916.

Application filed. June 9, 1910. Serial No. 566,028.

T 0 all whom it may concern Be it known that I, SAMUEL RIoI-IARosoN, a citizen of the United States, and residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Traps, of which the following in a specification.

The invention has reference in general to traps and particularly to tilting steam traps, and the valve mechanism and operating means therefor.

The invention has for its chief objects; the provision of an improved pressure controlled valve mechanism for tilting traps, operable equally well under high and low pressures and securing more effective and sensitive operation of the trap; and in general the provision of an improved arrangement of trap and operating mechanism therefor. This together with such other objects as may hereinafter appear or are incidental to my invention, I attain by means of a construction illustrated in the accompanying drawings, wherein Figure 1 is a side elevation of a non-return trap with my improved valve mechanism applied thereto; Fig. 2 is an end elevation of Fig. 1 with the weight 11 removed, and Fig. 3 is an enlarged section through my improved valve mechanism. Fig. 4 is an enlarged view of a detail of my invention.

Hitherto it has been diflicult to secure a valve mechanism for traps wherein the valve would work equally well under high and low pressures, such valves when working well under low pressure either sticking or holding 011 its seat under high pressure, thus impairing the effectiveness of the trap. My invention is designedto overcome these difficulties and to provide a trap mechanism applicable for use on steam or air pressure systems such as heating systems, boilers, engines, etc, where there is a condensation of oil, water, or other liquid, whether such systems are high or low pressure or a combination thereof.

Referring to the drawings, it will be seen I have illustrated a tilting tank 7 of the usual character supported in the frame 8 by a trunnion comprising the pipes 9 and 10, and provided with a counterbalance weight 11. Leading into the portion 9 of the trunnion is a steam or other pressure inlet pipe 12. The other portion, 10, opens into a valve casing 13 provided with an outlet pipe 14. The trunnion is provided with the usual discharge pipe 15 indicated in clotted lines in Fig. 1.

Referring now more particularly to my improved valve mechanism it will be seen that I have mounted in the casing 13 a cylinder 16 closed at one end. Working in this cylinder and having a comparatively loose fit therein is a piston 17 having a stem 18 carrying a valve 19 for controlling the flow from the tank into the outlet pipe 14-, such valve being shown in open position in Fig. 3. On inspection of this figure it will be seen that normally there remains a space 20 between the top of the piston 17 and the closed end of the cylinder 16. Pressure from the tank leaks past the piston 17 into such space and balances the piston and the valve 19 carried thereby, assisting in holding the latter in closed position. Opening into the space 20 1s a pipe 21 carrying a pilot valve 22, which comprises a stem 23, the lower end of Which takes against the seat 24 and closes the outlet or atmospheric opening 25 of the pilot valve. The pilot valve is operated by the tilting of the trap in the following manner: A movable rod 26 is mounted in a bracket adjacent the valve casing 13 and carries the arm 27 at its lower end. This arm 27 is operated by the lugs or projections 28 7 and 29 formed on the strap 30 which is secured to the body of the tank in any preferred manner. The stem 23 of the pilot valve is provided with a forked arm 31 engaging the rod 26 between the adjustable buttons or stops 32. The lugs 28 and 29 are provided with studs 28 and 29 for adjusting the movement of the arm 27 with respect to the movement of the tank as will be clear from inspection of Fig. 4, and the stops 32 are adjustable to regulate the movement of the stem 23 of the pilot valve. This arrangement of parts is advantageous in that the desired travel of the pilot valve is secured irrespective of the movement of the tank and the lost motion permits of the movement of the pilot valve at the proper period of the movement of the tank.

The operation of the device is as follows: Upon the tilting of the tank 7 the lug 29 takes against the arm 27 and thereby raises the rod 26 which in turn through the stop 32'raises the arm 31 and stem 23 of the pilot valve, opening the pilot valve and exhausting the accumulated pressure at the top Of the cylinder 16 through the .outlet 25 of the pilot valve to the atmosphere. This reduction of pressure immediately causes the piston 17 to rise in the cylinder and opens the controlling valve 19, the pressure from the live steam inlet pipe 12 allowing the condensation in the tank to discharge through the outlet pipe 14. Upon the emptying of the tank the weight llreturns the tank to normal position whereupon the lug 28 takes against the arm 27 and carries the rod 26, arm 31, and stem 23 downward thereby closing the pilot valve and shutting oif communication between the upper portion of the cylinder and the atmosphere. The flow of pressure from the trap closes the valve and the trap is ready for another filling.

I have found that thisarrangement of pressure controlled valve works equally well under high and low pressure and that the trap is quicker and more sensitivein its operation than if the tilting of the tank actuated the valve 19 directly.

1 It is obvious that my invention is applicable to a variety of uses and that modifications may be made without departing from the spirit of my'invention, the chief characteristic, and that which is essential to and secures the sensitive and practical operation of the trap, being the provision of an improved fluid controlled valve mechanism embodying the principles herein enumerated. It is also obvious that my improved valve mechanism may be'applied equally well to the inlet as well as the outlet of the trap, as for instance on a return trap.

Having thus described my invention and illustrated its use what I claim as new and desire to secure'by Letters Patent is the "Tol- 1. Inconibination, a tilting tank,an exhaust axis therefor communicating with'a pressure controlled valve, means for opening and closing the valve comprising a pilot valve provided with a vertically movable stem having an arm formed thereon, a. rod movably mounted on a suitable support and having a connection at its upper end with said arm, and further provided with an oppositely disposed arm on its lower end having an adjustable lost motion connection with said tank.

2. In a trap of the character described, a

in the fitting for said outlet and whose stem is provided with a projecting forked member, and a movable rod interposed between the valve and the tank and operatively engaging 'withthe forked member, said rod being adapted to receive reciprocating movement from the tank.

3. In combination, a tilting tank, a chambered fitting disposed to one side of the tank substantially in line with the axis of tilt and provided with a discharge opening, exhaust connections between the tank and the chambered fitting, a valve for the opening movable in said fitting and having a piston moving in a' cylinder mounted in the fitting, said cylinder having a closed end to constitute a pressure chamber, a pilot valvein communication with the chamber, and adjustable means forcontrolling the pilot'valve comprisinga movable rod carried by the fitting and oppositely disposed arms on the rod connecting it with the tank and the stem of the pilot valve.

4..In a trap of the character described, the rombination of a frame,a tilting tank providedwith pressureadmission inlet, a chambered valve casing fixedly'associated with said frame and provided with an outlet, an' exhaust trunnion conduit leading'from the tank interior to theinlet side of the casing, a main pressure controlled piston valveinsaid casing for said outlet, a pressure chamber above said valve adapted to receive-a supply of pressure from the tank through said exhaust conduit to overbalan'ce themain valve and maintain the same, closed down *on-its'seat, there being anexhaust passage leadingfrom said chamber, a pilot valve adapted to exhaust the p'ressure'in said chamber through said passage whereby'to open the main valve, and meansoperatively connected to the tank adapted to actuate the pilot valve when the tank tilts.

testimony whereof I have hereunto signed my name in the presence of the two subscribed witnesses. V

SAMUEL RICHARDSON.

Witnesses:

F. T. DONOHUE, M. W. LINK.

Copies of this patent may be' 'obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). C. 

